Oracle Spatial Object Reader Parameters

About Database Connections

Database formats include a Database Connection parameter that defines and stores authentication information. For general information about sharing database connections, please see Using Database Connections. Using Database Connections.

Note that Database Connection parameters differ slightly, depending on context and/or database format.

Connection

From the Connection parameter in a database format, you can do one of the following:

  • Select an existing, previously defined connection. See the section Reusing a Database Connection in Using Database Connections
  • Select Add Database Connection to define a new connection. See database-specific parameters below, as well as the section Adding a Database Connection in a Workspace in Using Database Connections. The new connection can be made visible only to the current user, or can be shared among multiple users.

Connection Parameters

Oracle Workspace

The name of the Oracle Workspace Manager workspace that will be used by the reader. All tables will be read using the same workspace. If this parameter is omitted, or left blank, the default LIVE workspace will be used.

Persistent Connection

If this parameter is checked (default), the Oracle database connection remains open for other requestors. A persistent connection is useful for workspaces that are long-running, or published using FME Flow.

If this parameter is unchecked, the connection to the Oracle database is closed as soon as possible after data processing is complete.

Include System Tables

If checked, the Tables parameter (in Reader Parameters and Reader Feature Type Parameters), and the Merge Filter checkbox in the Reader Feature Type Parameters dialog will include tables that live in system schemas, or contain special characters like / and $.

If unchecked, Tables and Merge Filter will not include system tables or tables with special characters.

Note  Recycled tables (names starting with BIN$) will never be included.

Constraints

MapInfo Symbology

Additional Attributes to Expose

Use this parameter to expose Format Attributes in FME Workbench when you create a workspace:

  • In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
  • In a non-dynamic scenario, this parameter allows you to expose additional attributes on multiple feature types. Click the browse button to view the available format attributes (which are different for each format) for the reader.
 

A search envelope (also known as a bounding box) is a rectangular area that defines a geographic area. In FME, the easiest way to define a search envelope is to use search envelope parameters.

Defining a search envelope is the most efficient method of selecting an area of interest because FME will read only the data that is necessary – it does not have to read an entire dataset. Search Envelope parameters apply to both vector and raster datasets and can be particularly efficient if the source format has a spatial index.

Most FME readers have parameters to define the search envelope of data that is being read:

Screenshot with blank search envelope min and max x and y parameters

The parameters include the x and y coordinates of the bounding box as well as a parameter that defines the coordinate system.

How to Define the Bounding Box

Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that intersect with the bounding box are returned. Note that the bounding box intersection is not a full geometry intersection (based on spatial relationships) that would be returned by a transformer like the SpatialFilter.

Note  If all four coordinates of the search envelope are left at 0, the search envelope will be disabled even if this option is checked.

Search Envelope Coordinate System

Specifies the coordinate system of the search envelope if it is different than the coordinate system of the data. The coordinate system associated with the data to be read must always be set if this parameter is set.

If this parameter is set, the minimum and maximum points of the search envelope are reprojected from the Search Envelope Coordinate System to the reader’s coordinate system prior to applying the envelope.

Advanced

Bulk Read Size

Rows are read from the Oracle database using a bulk reading technique to maximize performance. This parameter allows you to tune the performance of the reader by specifying how many rows are read from the database at a time.

The default is 200.